SpaceX (SPCX) is expanding Starlink Mobile, increasing competition concerns for traditional telecom providers which fell for a second day. T Mobile (TMUS) fell 13%, while AT&T (T) and Verizon (VZ) each declined 10%. Tower operators rallied, with Crown Castle (CCI) up 12%, American Tower (AMT) gaining 8% and SBA Communications (SBAC) rising 6%.